CONTENT WARNING: This profile contains references to kidnapping, child abuse and torture (isolation, starvation, electrocution), (attempted) mass murder, and self-destructive habits. Overt detail has been spared, but the worst of it is highlighted in the same color as the text and must be highlighted to read properly. My apologies, mobile users!
If you are curious about Ryoken's source, you can see the Does the Dog Die? page for Yu-Gi-Oh! VRAINS
here.